Noob Saibot is a fictional character from the Mortal Kombat video game series. He first appeared in Mortal Kombat II as a hidden character and is known for his dark, shadowy appearance. Noob Saibot is the original Sub-Zero, who was killed and resurrected as a wraith, gaining powers related to darkness and shadow manipulation. His name is derived from the creators of the game, Ed Boon and John Tobias, as it is a reversal of their last names. Noob Saibot is often portrayed as a villain, fighting against other characters in the series. He has become a popular figure among fans for his unique abilities and backstory.